Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
formal context » formal contexts, formal concept, formats content
10 developing » 1 developing, 3 developing, 4 developing
from formal » from informal
context how » content how, context has, context he
how face » how race, how space, how false
costs 10 » costs 1, costs 20, costs 60

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology from formal context how face communication costs 10 developing _ africa.*.